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fib Symposium 2011 – paper and presentation

Last week, I attended the fib Symposium 2011 in Prague, and presented some of my experimental results in the Friday morning session on Construction Technology.

The full paper is published on the CD proceedings, and the short version of 4 pages is published in the printed version of the proceedings. The abstract is the following:

Reinforced concrete one-way slabs subjected to concentrated loads are designed for shear by checking beam shear over an effective width and punching shear. Only a limited number of test data regarding the shear capacity of one-way slabs subjected to concentrated loads is available. To better evaluate the shear capacity of reinforced concrete one-way slabs, a series of experiments has been carried out on continuous one-way slabs (5m x 2,5m x 0,3m) loaded close to the support. The influence of the shear span to depth ratio is discussed. Conclusions about the influence of this parameter on the one-way shear capacity of reinforced concrete slabs and possible explanations for the difference with beams are provided. Test results are compared to the Eurocode provisions and a method to calculate shear capacity from the literature. A higher shear strength is found as compared to the Eurocode. As a result of these experiments expressions resulting in a higher theoretical shear strength for the design of one-way slabs under concentrated loads are recommended.
The keywords were: Shear, One-Way Slabs, Effective Width
Here are the slides I used for my 12 minute presentation:

As you can see, I added the tables with the experimental results which I used in the paper as a few extra slides at the end of my presentation. I didn’t want to go over all the numbers during my talk, but I wanted to be prepared for more detailed questions. And in fact, I had a question about the flexural capacity of the tested slabs, so I could simply show the table with the reinforcement ratios and explain how we designed the reinforcement.

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